Pregnancy Test-potential Risks-unsafe Sex Overview

A STD is a contagious disease that can be transferred to another person through sexual intercourse or other sexual contact. Many of the organisms that cause sexually-transmitted diseases live on the penis , vagina , anus, mouth, and the skin of surrounding areas.

Most of the diseases are transferred by direct contact with a sore on the genitals or mouth. However, some organisms can be transferred in body fluids without causing a visible sore. They can be transferred to another person during oral, vaginal, or anal intercourse.

Some STDs can also be transferred by nonsexual contact with infected tissues or fluids, such as infected blood. For example, sharing needles when using IV drugs is a major cause of HIV and hepatitis B transmission. An STD can also be transmitted through contaminated blood transfusions and blood products, through the placenta from the mother to the fetus, and sometimes through breast feeding.